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參數(shù)資料
| 型號： | CY7C474-25JC |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | DRAM |
| 英文描述： | 8K x 9 FIFO, 16K x 9 FIFO 32K x 9 FIFO with Programmable Flags |
| 中文描述： | 32K X 9 OTHER FIFO, 25 ns, PQCC32 |
| 封裝： | PLASTIC, LCC-32 |
| 文件頁數(shù)： | 10/15頁 |
| 文件大小： | 270K |
| 代理商： | CY7C474-25JC |
CY7C470
CY7C472
CY7C474
10
Table 1. Flag Truth Table
[13]
HF
1
1
1
0
0
0
E/F
0
1
1
1
1
0
PAFE
0
0
1
1
0
0
State
CY77C470
(8K x 9)
Number of Words
in FIFO
CY77C472
(16K x 9)
Number of Words in
FIFO
CY77C474
(32K x 9)
Number of Words in
FIFO
Empty
Almost Empty
Less than Half Full
Greater than Half Full
Almost Full
Full
0
0
0
1
(P – 1)
P
4096
4097
(8192 – P)
(8192 – P+1)
8191
8192
1
(P – 1)
P
8192
8193
(16384 – P)
(16384 – P+1)
16383
16384
1
(P – 1)
P
16384
16385
(32768 – P)
(32768 – P+1)
32767
32768
Table 2. Programmable Almost Full/Empty Options
[14]
D3
D2
D1
0
0
0
0
0
0
0
0
1
0
0
1
0
1
0
0
1
0
0
1
1
0
1
1
1
0
0
1
0
0
1
0
1
D0
0
1
0
1
0
1
0
1
0
1
0
PAFE Active when:
256 or less locations from Empty/Full (default)
16 or less locations from Empty/Full
32 or less locations from Empty/Full
64 or less locations from Empty/Full
128 or less locations from Empty/Full
256 or less locations from Empty/Full (default)
512 or less locations from Empty/Full
1024 or less locations from Empty/Full
2048 or less locations from Empty/Full
4098 or less locations from Empty/Full
[15]
8192 or less locations from Empty/Full
[16]
P
256
16
32
64
128
256
512
1024
2048
4098
8192
Notes:
13. See Table 2for P values.
14. Almost flags default to 256 locations from Empty/Full.
15. Only for CY7C472 and CY7C474.
16. Only for CY7C470.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY7C474-25JI | 8K x 9 FIFO, 16K x 9 FIFO 32K x 9 FIFO with Programmable Flags |
| CY7C474-25PC | 8K x 9 FIFO, 16K x 9 FIFO 32K x 9 FIFO with Programmable Flags |
| CY7C474-40DMB | 8K x 9 FIFO, 16K x 9 FIFO 32K x 9 FIFO with Programmable Flags |
| CY7C474-40JC | 8K x 9 FIFO, 16K x 9 FIFO 32K x 9 FIFO with Programmable Flags |
| CY7C474-40JI | 8K x 9 FIFO, 16K x 9 FIFO 32K x 9 FIFO with Programmable Flags |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY7C4801-15AC | 制造商:Cypress Semiconductor 功能描述:FIFO, 2 x 256 x 9, Synchronous, 64 Pin, Plastic, QFP |
| CY7C4821-25AC | 制造商:Cypress Semiconductor 功能描述:FIFO Mem Sync Quad Depth/Width Bi-Dir 1K x 9 x 2 64-Pin TQFP 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY7C4831-10AC | 制造商:Cypress Semiconductor 功能描述:FIFO Mem Sync Quad Depth/Width Bi-Dir 2K x 9 x 2 64-Pin TQFP 制造商:Rochester Electronics LLC 功能描述:2K X9 X2 DOUBLE SYNC FIFO - Bulk |
| CY7C4831-25AC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY7C4841-15AC | 制造商:Cypress Semiconductor 功能描述:FIFO Mem Sync Quad Depth/Width Bi-Dir 4K x 9 x 2 64-Pin TQFP 制造商:Rochester Electronics LLC 功能描述:4K X9 X2 DOUBLE SYNC FIFO - Bulk |
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